Typewriting machine



TYPEWRITING MACHINE Filed Jun 21, 1937 6 Sheets-Sheet 1 INVENTOR RUSSELLG. THOMPSON ATTORNEY April 1939- R. G. THOMPSON TYPEWRITlNG MACHINE 6Sheets-Sheet 2 Filed June 21, 1937 INVENTOR RUSSELL 6. THOMPSON m I 3 Qs 5 k E 5 W ,.m o..l..r 7 1 \0 E h w m w km %S April 1939- R. G.THOMPSON 2,156,000

TYPEWRITING MACHINE Filed June 21, 1957 6 Sheets-Sheet 3 INVENTOR RUSSELL G. THOMPSON TTORNEY THOMPSON P il 25 ING MACHINE 6 S'neet 4 F51? me21, 193? 7 \M 6 w z a m In W U J April 25, 1939. R. e. THOMPSONTYPEWRITING MACHINE 6 Sheets-Sheet 5 Filed June 2l, 1937 INVENTORRUSSIELL a. THOMPSON BY ATTORNEY April 25, 1939.

R. G. THOMPSON 2,156,000 TYPEWRITING MACHINE Filed June 21, 1937 6Sheets-Sheet 6 Z IIIIIIIII IIIII w INVENTOR I RUSSELL G. THOMPSON BYPatented Apr. 25, 1939 UNITED STATES PATENT OFFICE mnwnrrma mom RussellG. Thompson, West Hartford, Conn, as-

signor to Underwood Elliott Fisher Company, New York N. Y., acorporation of Delaware This invention relates to typewriting machinesand with regard to certain more specific features thereof to an improvedtype action and means for eflecting and controlling the movement of'theparts thereof. While the invention is shown and described in connectionwith a power-driven typewriter it will be obvious that several featuresof the invention are applicable to manually operated machines. 4

The invention has for one of its objects to provide a group of typeactions each of which is suited to the particular requirements of apowerdriven machine. It is well known that suchma chines present aparticularly diflicult'problem' because of the shocks incident to theengagement of the individual type actions with the driving means, andalso because of the peculiar character of the blow on the engaged memberby the driving means. In power-driven typewriters the mechanism foraccomplishing the movement of the type bar to and from the platen isentirely removed from the control of the operator and the action of thepower means when engaged is inclined to loosen and destroy the parts ofthe type action and increase the noise incident to all contac s.

Another difl'iculty presented by the employment of the power-drive unitand the shock incident to engagement therewith is the tendency of thetype bar to vibrate as it approaches the platen in consequence of whichthe type bar is apt to impinge on the type bar guide adjacent theprinting point and destroy the regularity of the writing and also resultin exceptional wear of the parts. I

The type action here involved is of the noise less character and it isan object of the invention to so improve and modify such a type actionas to make it capable of substantially silent power operation withoutthe interposition of any elastic or yielding connections between thepowerdrive unit and the type bar, it being particularly an aim of theinvention to adapt the thrust principle of operation of a type bar to afluted roller or.1 other form of constantly operating powerdrive unit sothat the labor of the operator is reduced to the mere selection of theproper keys and engagement thereby of the actuating device of the typebar with the power-drive.

Itis a further aim of the invention to produce a quiet power-drivenmachine in which the thrust principle of type bar operation is used inconnection with a standard four-bank keyboard and a single shift platen,and in which a number of type bars segmentally arranged for selectiveadvance to the printing point are provided with upper and lower typeheads each of which may have two type characters, the movement ofeachtype bar in connection with such a construction being in variablepaths controlled by diflerent keys at the keyboard.

Another object of the inventionis to insure the continuance of a togglelocked position of the supporting means for the forward end of the typebar as it completes its movement to the 10 platen andlto a reasonableextent away therefrom whether the type bar be moved in one path or theother by the selection of one or the other of the two keys which controlits operation. Thus the pivotal axes of the bar areheld firmly when thebar is in the vicinity of the type g de and vibratory tendencies arechecked.

Other objects are to provide improved means for deadening the soundsoriginating in contacts of the various parts of the action. Thisincludes the contact of the type-with the paper onthe platen, thestopping of the power-drivelever in its advance of the typebar and thereturn of the energy storing device or hammer to its position of rest.

Another object of the invention is to provide a sturdy, inexpensive andgenerally improved power-drive unit between the selecting keys and thetype bars, such unit being extremely compact and quiet in its operationand being especially adapted to the actuationof a series of type barsarcuately arranged above the unit, and correspondingly suited to acontrol of the carriage in its escapement, case shift, return and backspacingmovements.

Other objects will be in part obvious and in part particularly pointedout as the description of one preferred embodiment of the inventionproceeds.

In the drawings: i

Fig. 1 is a view in top plan of a power-driven typewriting machinecomprising the present invention.

Fig. 2 is a, view in fore-and-aft section of the I machine shown in Fig.l.

45 Fig. 3 is a fore-and-aft sectional view through the machine showingthe type action advanced from its normal position of rest, as shown inFig. 2, to a position of lower-case printing by th upper head of thetype bar. I

Fig. 4 is a fore-and-aft sectional view through 'the machine showing atype action advanced 3, but with the platen elevated to receive theimprint of the upper case character of the upper head of the type bar.

Fig. 5 is a fore-and-aft section through the machine showing the sametype action as seen in Figs. 2 to 4 inclusive but as viewed from theopposite side and with the type bar in its retracted position.

Fig. 6 is a' fore-'and-aft section through the frame showing the sametype action as seen in Fig. 5 but as operated by the selection ofanother key at the keyboard to advance the type bar for printing by alower-case character on the lower head of the bar. 8

Fig. 7 is a view in perspective of one of the type action hangers.

The machine is shown generally in Figs. 1 and 2 of the drawings. Itcomprises a frame having side walls 2| and 22 connected by a front bar23 and by a rear bar 24. The side walls are further connected by a baror backbone 25, cross bars 28 and 21 and atop plate 28.

The top plate has an arcuate bar 38 upon which are mounted the forwardends of a multiplicity of type actions indicated generally at 3|. Thetype actions are radially arranged and have rear supports in an arcuatebar 32 fixed to the top plate and provided with comb slots 33 to guidetype bars 34. The latter are further guidedby comb slots 35 and 38 inarcuate webs 3'! and 38 projecting downwardly from a guide member 48suitably mounted on the top plate below a cover 4|.

Toward the rear of the machine a center-tie 42 is adjustably fixed forslight fore-and-aft movement on a cross bar 43 and this center-tiecarries the pivotal supports for a case-shifting rocker- 44, arms 45 ofwhich pivotally support a track 41 which through anti-friction bearingssupports a. carriage rail 48 connected to suitable carriage endframes-in which a roller platen 58 is mounted. The carriage alsoincludes a rail 5| which, in the transverse movements of the carriage,is biased against a forward face of an upstanding arm 52 of thecenter-tie. A backing screw 53 is threaded in the upper portion of therear wall 24 and suitably resists printing pressures on the platen. Thiscenter-tie construction and the means for ad- J'usting the center-tierelatively to the frame are described and claimed in my copendingapplication filed Feb. 20, 1937, Serial No. 126,902.

A'magazine 55 is secured to spaced webs 56 extending rearwardly from thecenter-tie and contains one or more tabulator stop blades 51 adapted.for poweroperation, as clearly shown and described in my copendingapplication filed April 1, 1937, Serial No. 134,324.

Any desired means may be employed for raising and lowering the carriageframe and consequently case-shifting the platen, but it is preferred tomake use of a link 58 having its upper end connected to the rocker frame44 and its lower end connected to a link 68 by a pivot stud 6|. The link68 in turn is pivotally connected at 62 with an arm 63 adjustablysecured to the frame of the machine. When the toggle involving links 58and 881s straightened the forward side of frame 44 is elevateddepressing the pivotal conmedian 45 and lowering the platen to itsnormal or lower case position. This position is deter- 1 58 and link 68.Lever arm- 68 is suitably connected to an actuator 18 which carriespawls adapted to be moved into engagement with a toothed drive shaft 1!by operation of a case-shifting key at the keyboard. Depression of thiskey causes a pawl to engage 0n the forward side of drive shaft II and bemoved downwardly carrying the actuator 18, which breaks toggle 58-68,pulling link 58 downwardly and rocking frame 44 to elevate the carriageuntil the head of pivot stud 66 comes against a cushion stop 12 at whichtime a toggle comprising links 61 and 68 is straightened to hold thecarriage in upper case position until the de pressed case-shift key isreleased. Upon release of the key a pawl at the rear side of the driveshaft engages the unit to move the actuator 18 upwardly and return theparts to original position with head of stud 66 against a stop 59. Thecase-shift mechanism herein briefly mentioned is fully described andclaimed in my copending application filed Feb. 20, 1937, Serial No.126,904.

An electric motor is positioned in a casing I3 at the rear of side wall22. The motor is connected to continuously rotate the power-drive memberH which, in the present preferred form of the invention, is a toothedroller extending almost entirely across the machine and rotating in acounterclockwise direction, as viewed in Fig. 2 of the drawings.

Provision is also made for returning the carriage to commence a new lineof writing by momentarily connecting the motor with a drum indicated at14, which winds up a tape 15 connected to the carriage and line-spacingmechanism, and restores the carriage to starting position. Theconnection is made through a friction clutch indicated at 16 which isrendered effective by pressure upon the carriage-return key at thekeyboard (see Fig. 1). This carriage-return mechanism, together withmeans forline-spacing on each return and for power-driven additionallinespacing, is clearly shown and described in my oo-pending applicationfiled Feb. 20, 1937, Serial No. 126,983,'now Patent No. 2,103,921,issued Dec. 28, 1937.

In the present embodiment of the invention shown in the drawings the topplate 28 is adapted for the mounting of twenty-two type bars. Each ofthe type bars is adapted for actuation by the operation of either-of twokeys at the keyboard. Except for minor differences due to the variationsin angularity of mounting, all the type bars and their associated partsare idGI'ifi'.

cal and the following description of one type action will be sufficientfor the purpose of the present case.

In Fig. 7 of the drawings an improved hanger 88 is shown. This hanger ismade up of two or more thin metal pieces which may be held'together byspaced rivets or suitably spot welded. Thus a laminated hanger structureis produced which includes an arm 8| adapted to fit into a slot 82 cutin the arcuate bar 38 of the top plate 28. The laminated hanger 88 alsocomprises an arm 83 which is notched at 84 to fit it over a rib 85 onthe arcuate bar 32. A lower lip 86 of arm 83 fits in a radial slotthrough the bottom of bar 32 so that by the slots in the bottom of bar32 and the slots in bar 38 the hangers 88 of a complete series aredefinitely located in substantially radial arrangement.

The hangers 88 are also provided with cushion stop and noise reducingfeatures in the form of a slender bent-over finger 81 of the laminatedhanger and in the form of a pile or bank 88' of very thin metal stripsarranged along the top of arm 8I and held in position thereon by straps99 at opposite ends of the bank. The laminated finger 81 serves tocushion the blow and reduce the noise of impact of the lever whichdrives the type bar forward toward the printing point. The bank 88 ofsuperposed thin spring metal strips cushions and reduces the noise ofimpact incident to the return of the type, bar.

The hanger 89 is laminated in major part but beyond the arm 83 one ofthe sheet metal laminations is carried beyond the laminated structureproviding an arm 9I whichserves as a pivot support, as will hereinafterappear.

The type bars 34 suitably guided in comb slots 33, 35 and 36 aresupported for pivotal movement on the hangers 89. Each type bar isconnected to its hanger by two links 92 and 93. The link 92 is pivotedto the type bar 34 at 94 and the lower end of link 92 is pivotallyconnected at 95 to an arm 99 which is adjustably fixed to the hanger 89.The link 93 has its upper end pivotally connected to the type bar 34 at91 and its lower end connected to a rocker arm or link 98 which ispivoted at I99. at the extreme end of arm 9I which was heretoforedescribed as a continuation of one of the laminations of hanger 89. Thusit will be seen that link 92 has its lower connection substantiallyfixed except for possibility of slight adjustment provided by eccentricadjusting device I9I. Link 93, however, has its lower pivotal connectionon rocker arm or link 98 and the axis of motion of link 93 may thereforebe varied.

The type bar 34 is also connected to the hanger so through a toggleindicated generally at I92 comprising links I93 and I94. Link I93comprises two uniformly shaped sheet metal pieces provided with asuitable spacer at I95 and is pivotally connected to the type bar 34 andlink 92 at the pivot 94. The ends of the spaced members are broughttogether as indicated at I99 and I91 and at end I91 link I93 passesbetween spaced sides of link I94 and is pivoted thereto at I98. Theother end of link I94 is pivoted to the hanger 89 at II9.

Link I94 is provided on both sides with arms III between which an endII2 of a hammer H3 is pivoted. A driving lever H4 is pivoted to hanger89 at H5 and has a curved face II6 underlying the hanger'89 and thelevers on opposite sides of the hanger as will hereinafter appear. LeverI I4 has arms II! extending upwardly on opposite sidesof hanger 89 andtheir upper ends fork around hammer H3 and are pivotally secured theretoat II8. AL bridge I29 joins the opposite sides of lever H4 and the leveris adapted, upon movement in a clockwise direction, as viewed in Fig. 2of the drawings, to tension a spring I2I until bridge I29 abuts thefinger stop 31 of the hanger.

Such movement tends to straighten the toggle I92 and advance the typebar 34 toward the platen 59. As will later appear, the driving lever M9is not given its entire throw to stop position under {direct control ofthe power actuators of the machine, but instead the lever is moved partway under direct control of the power actuators and the final throw ofthe lever and consequent final advance of the type bar is efiected bythe momentum accumulator or energy storing device 8 it? which ultimatelystraightens the toggle I92 and applies suitable printing pressure towhichever type is at the printing line. To vary this pressure the platenis adjusted fore and aft of the machine by a hand wheel I22 on screw 59,

3 and 4. The movement of the axis X from one position to the other andthe fixing of the axis in the different positions is effected by asystem of levers and toggle links which will be later described. Thepower drive mechanism comprises primarily the toothed or fluted roller Hwhich is continuously rotated in a counter-clockwise direction, asviewed in Fig. 2, from the electric motor positioned in the casing 13.The backbone 25 has a flange I23 extending downwardly at a right angleto its body. It also has an upwardly extending flange I99 and arearwardly extending flange I I9. By a circular gang cutter a series ofslots I24 is cut in the rear of the backbone and these slots are cutdeep enough that the peripheries of the cutters pass through the flangesI99 and H9 and through the shoulder formed by the body and flange I23 ofthe backbone. Thus at I25 (Fig. 2) the slots extend entirely through thebackbone for a purpose which will later appear. In each of the slots I24 an actuator I29 is arranged. These actuators are substantiallyuniform in character having an easy sliding movement in the slots andthey are located in transverse alignment by a pivot pin or rod I21 whichpasses through the flange H9 and through a vertical slot I28 in each ofthe actuators. Each of the actuators carries a pawl I39 pivoted thereonat I3I and having teeth I32 to engage with the teeth of drive shaft 1|.A forward edge I33.of each actuator bears against the rear face offlange I23 of backbone 25 and is normally held thereagainst by a springI34 the lower end of which engages a lower arm I35 of the actuator andthe upper end of which is connected to an anchor plate I39secured to theunderside of flange I23. Spring I34 causes the actuator to pivot aroundpin I21 and hold pawl I39 normally out of'engagement with the driveshaft.

A standard 4 band keyboard is indicated at I31. Each character key onthe keyboard is associated with a key lever I38 the end I49 of whichextends into one of the slots I24 in the flange I99 of the backbone andis pivotally connected therewith by a pivot pin I4I. Each key lever alsohas an arm- I42 which carries a dog I43 pivoted at I44 and normally heldin the position indicated in Fig. 2 by a spring I45. Each dog E43 passesthrough the opening provided at I25 by the gang cutting of slots I24and, therefore, for each actuator arranged within a slot I 24 there is adog H93 in the same slot in position to move the actuator upondepression of the corresponding key lever I38. Such lever movementengages pawl i39 with drive roller 1| which causes an approximately 30rotation of pawl 539 against a suitable stop and a simultaneous downwardmovement of the actuator. The engagement of the first tooth of the pawlleads the second tooth into actuating engagement with the next tooth ofthe drive roller. A lug I49 near the lower end of the actuator passesbetween the balls of a crowder lock I41 and simultaneously the actuatorpicks up a universal bar E98 and rocks it for the purpose of efiectingescapement and ribbonvibration operations. As 7 the actuator proceedsdownwardly in engagement with the drive roller a cam edge I50 of theactuator engages an adjustable throw-off screw I which insuresdisengagement of pawl I30 with the driving shaft and causes it to bereturned to the control of spring I 34 which eventually draws theactuator back against the rear face of the backbone.

In addition to the actuators which are placed in engagement with thedrive shaft by operation' of the character keys, there are similaractuators in the same row undercontrol of the space bar (indicated atI52 in Figs. 1 and 2), the carriage shift key, tabulator bar I49, andvarious other keys controlling the operation of the typewriter. Theseactuators are all carried by the backbone which also guides and pivotsthe key levers and also guides the actuating dogs, the function of whichis to engage the actuators with the driving shaft.

A bar I53 of sound deadening. material such as rubber or leather extendstransversely on the machine in a metal support I54 and is adapted toreceive the impact of arms I35 of the actuators as they are thrown offby screws I5I and returned to normal position by their return springsI34. The face of bar I53 is set at a slight angle so that as theactuator returns upwardly to its original position the end of arm I35may slide along this face until eventually the actuator is depositedagainst the backbone. All of the key levers have return springs I55connected to an adjustable anchor plate I56. The springs normally holdthe key lever against an upper stop I51 of cushioning material and thekey levers have a uniform movement of depression to a lower stop I58, asclearly described and claimed in my copending application filed Feb.20,1937, Serial No. 126,905.

According to the present invention, each type bar is controlled by twodifferent keys and consequently by two actuators. Preferably, therefore,the actuators I26 are arranged in successive pairs across the machine.From the upper ends of .the actuators of one pair links I60 and I6Iextend respectively to opposite sides of each hanger 80. Link I60 ispivotally connected at I62 to a rock lever I63 which is pivoted on thehanger 80 at I64. This lever has a circular 'hole I65 within whichextends a stop pin I66 extending laterally from the hanger 80. The holeI65 and pin I66 determine the extremes of movement of lever I63. Thus,viewing the construction in Fig. 2 of the drawings, as an actuator I26is engaged with the power drive shaft and moved downwardly, link I60pulls down the forward end of lever I63 until the lower edge of hole I65 abuts the stop pin I 66. The rear end of the lever is thus thigiwnupwardly to a stop position, which is clearly shown in Fig. 4. This endof the lever is pivotally connected to one end of a link I61, the otherend of which is pivotally connected at I68 intermediate the pivoted endsof a link I10. The lower pivoted end I1I of this link is connected torocker 98 which, as heretofore described, is pivoted at I 00 on the endof the hange1-80 and the other end of which carries the variable pivot Xof link 93. The upper end of link I10 is connected by a short link l12wit'h a bracket arm I13 fixed to the hanger 80. Thus a downward pull onpoint I 62 of the lever I63 straightens a toggle from stop I66 throughthe lever I63 to a toggle point T, thence through link I61 to pivotpoint I68 (see Fig.3); This type bar has substantial 98 and the pivotalaxis X. While this toggle is straightened the point X will not vary.

As lever I 63 is being pulled down to its stop position by its actuatorand link I60, 9. forward rocker end I14 of the lever engages with curvedface II6 of the drive lever H4 and rocks the drive lever around itspivot II5 to commence the straightening of toggle I02. Lever I63 arrivesat its stop and toggle-locked position before the drive lever II4 hascompleted its full movement. It is at this point that the energy storingdevice II3 picks up the movement of the type bar and carries it forwarduntil bridge I20 of the drive lever strikes against stop 81 at whichtime the toggle I02 is straightened and the lower case type of the upperhead of type bar 34 is brought into printing engagement with the paperon the platen (Fig. 3). I

Lever I63 has its rocker end supplemented by a guard I15 pivoted to thelever at I16 and pressed by spring I11. to normally hold a stop lip I18on the guard against the rocker end of the lever. The drive lever II4has a laterally extending pin I80 which rides along the upper edge ofguard I15 when the hammer I I3 is in control of the movement of the typebar toward the platen. Spring I2I returns the drive leverI I4 in theopposite direction and during the first part of this returning movementpin I 80 rides along the top edge of guard I15 in the oppositedirection. Therefore, the toggle comprising lever I63 and link I61 maynot be broken from the time that the hammer I I3 has started to pick upthe movement of the type bar to the time that this hammer has returnedunder the influence of the spring to a point in th operation in whichthe ty moved away from the printing point. The spring I2I continues toreturn the drive lever until the hammer H3 is rocked back onto the bankof thin strips which constitute its cushion stop, as heretoforedescribed.

While the pin on the drive lever is riding along the guide I15 in onedirection or the other, the

corresponding actuator I26 is, of course, held against return to itsupper normal position although it has been rejected from its engagementwith the driving shaft by the engagement of throw-off pin I5I with camedge I50 of the actuator. As soon, however, as the pin I80 rides overthe end of guard I15 the actuator is returned upwardly by its spring I34and carries with it the connector I60 thus moving upwardly the rockerend of lever I63 breaking the toggle I63-I61 and swinging the axis ofmovement X of link 93 substantially toward the position shown in Figs. 5and 6 of the drawings.

An adjacent actuator I26 controlled by another character key at thekeyboard has its upper end connected by connector I6I to a lever I8Ipivoted at I32 on the opposite side of hanger 80. This lever has arocker end I83 adapted to engage the curved face N6 of the drive leverII4 to move the drive lever in the same manner as ,moved by lever I63 toinstitute the straightening of toggle I02 and thrust the type bar 34toward the platen. However, lever I 8I when moved by its actuator firststraightens the toggle comprising the links I10 and I12 against a. guardI19 and moves the rocker 98 into a firmly held position indicated inFigs. 5 and 6 of the drawings. This is accomplished in the followingmanner.

It is possible that the return of theactuator for lever I63 may havebeen of sufiicient energy to' throw the lever over until the upper sideof hole 75 165 contacted with the pin I99 m which case thetoggle"Ila-I12 would be straightened and the parts would appear in theposition shown in Fig.

5 of the drawings even though connector "I had. 'not been pulled down byits actuator. When the actuator is pulled down the lever I9I, beingnotchedat I95 around a stop pin I96 which extends from the side of thehanger, is swung from the position shown in Fig. 5 until it is stoppedby engagement with pin I86, as shown in Fig. 6 of the drawings.

link I81 which lies beneath the hanger 90 with which the type bar ismoved'forwardly by the an arm I88 of a bell crank lever I99 pivoted atI9I on the Hanger 89. The other arm I92 of the bell crank lever lies onthe side of the hanger opposite lever It and its end is adapted toengage with lever I63 just above the hole I65. Swinging i of lever I8Ito its stop position as shown in Fig.- 6 of the drawings operates thebell crank lever I90 to throw lever I83 downwardly-until the upper sideof the hole I65 engages the stop pin I69.

drive lever in a different path to impress the lower case character ofthe lower head of the type bar against the paper on the platen. Thelever I BI is supplemented by a guard I89 similar to the one, on leverI93 and the drive lever has on its opposite arm II! a pin I92 whichdrives in .the nected to the bar andits other end pivoted in fixedrelationto the hanger, a rocker member same manner over the guard I89preventing any disturbance in the position of the pivotal point of link93 while the hammer H3 is in control of the advance or retraction oi thetype bar.v

For upper case printing by either the upper or lower heads of the typebars the carriage is shifted to an upper toggle-docked position byactuators similar to those described in connection with the characterkeys and as more particularly described and claimed in my copendingapplica tion filed Feb. 20,1937, Serial No. 126,904.

The carriage is provided with a letter feed escapement indicated at I93operatedfrom the universal bar I48, which is in turn power operated asany character lever or the space bar is depressed. This escapementincludes a shaft I94 splined at its lower end to accommodate thecarriage to escapement in either upper or lower case position, and theupper end of this shaft is provided with a pinion I95 meshing with arack I99 on the carriage. The escapement dogs are thrown out ofengagement when tabulating, as clearly shown and described in mycopending application filed April 1, 1937, Serial No. 134,324.

What is claimed is? i,

1.- In a typewriter, a frame, a plurality of type actions segmentallyarranged relatively to said frame, each type action comprising a hangersecured to the frame, a type bar, a toggle between the type bar and thehanger; a supporting link This lever is connected by curved for the typebar having one end pivotally connected to the bar and its other endpivoted in fixed relation -to the hanger, a rocker member pivoted on thehanger, a second type bar supporting link having one end connected tothe type bar and its other end connected to the rocker member on oneside of its pivot, a toggle link extending from said rocker member atthe other side of its pivot, another toggle link having one endpivotally connected to the first said toggle link and its other end heldfixed for pivotal movement relatively to the hanger, a lever pivotallymounted on one side of the hanger, a toggle link pivoted to the firstsaid toggle link having its end connected pivotally with an end of saidlever,

means for connecting the other end of said lever .to an actuator, meansfor limiting the range of pivotal movement of said lever, another leverpivotally mounted for movement in a limited range at the other side ofthe'hanger and having means for connecting one end with an actuator, afinger connected for movement by the last said lever to insurestraightening of a toggle comprising the first and second said togglelinks, and a driving lever operable by either of the aforesaid levers toactuate the toggle between the type .bar and the hanger.

2. In a typewriter, a frame, a plurality of type actions segmentallyarranged relatively to said frame, each type action comprising a hangersecured to the frame, a type bar, a toggle between the type bar and thehanger, a supporting link for the type bar having one end pivotallyconpivoted on the hanger, a second type-bar-sup porting link having oneend connected to the type bar and its other end connected to the rockermember on one side of its pivot, a toggle link extending from saidrocker member at the ment relatively to the hanger, a lever pivotallymounted on one side of the hanger, a toggle link pivoted to the firstsaid toggle link having its end connected pivotally with an end of saidlever, means for connecting the other end of said lever to an actuator,means for limiting the range of movable by its accumulated energy, tostraighten the toggle between the type bar and the hanger. RUSSELL G.THOMPSON.

